41071665221 has 4 divisors (see below), whose sum is σ = 41767795200. Its totient is φ = 40375535244.

The previous prime is 41071665203. The next prime is 41071665227. The reversal of 41071665221 is 12256617014.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 41071665221 - 2⁶ = 41071665157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41071665227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348064901 + ... + 348065018.

It is an arithmetic number, because the mean of its divisors is an integer number (10441948800).

Almost surely, 2^41071665221 is an apocalyptic number.

It is an amenable number.

41071665221 is a deficient number, since it is larger than the sum of its proper divisors (696129979).

41071665221 is an equidigital number, since it uses as much as digits as its factorization.

41071665221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696129978.

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 41071665221 in words is "forty-one billion, seventy-one million, six hundred sixty-five thousand, two hundred twenty-one".